Smart Alarm external siren with up to 80-meter open field Zigbee transmission (3.0) Requires smart alarm hub (L2H-SECUREGWAY). Mains powered 5V 1A (includes adaptor) with battery backup (supplied) / Low power indication / Tamper protection / Siren up to 105dB. Features: LOUD ALARM BOX WITH BATTERY BACK UP: Add an additional alarm to your system that can be activated when the alarm is triggered or activated manually BATTERY BACK UP: Even if you use lose power the SIREN remains active for up to 5 days with its battery back up EASY TO SET UP & INSTALL: Link to your Link2home Smart Home Alarm straight out of the box, allowing you to customise your system with 60 accessories; Easy to install on walls & in corners with no tools required EXTENSIVE 100 M WIRELESS ZIGBEE RANGE: Protect your garage and outbuildings with our 100 m wire-free range. Zigbee Technology means the more devices you add the stronger the signal becomes thanks to its Mesh network SECURE ENCRYPTION: The latest technology to